Architect's & Engineer's Specifications

The multi-channel power ampliﬁer shall be available in hardware conﬁguration of four analog input channels and powered output channels. Each channel output shall be individually selectable as low impedance or 70 Volt constant voltage outputs. Adjacent pairs of channels shall be bridgeable. Input signals shall be connected via eight 3-position Euro-style detachable terminal blocks, and may be conﬁgured as balanced or unbalanced inputs. Ampliﬁed outputs shall be connected via four 4-position barrier strip terminal blocks with screw terminals. The power ampliﬁer sections shall be of a highly efﬁcient ampliﬁer design yielding 300 Watts per channel into 8 Ohms or 70.7 Volts. Bridged channel output shall be 600 Watts per bridged channel pairs into 16 Ohms or 140 Volts. Frequency response at 1 Watt under an 8 Ohms load shall be 5 Hz to 20 kHz. The power amplifier shall be capable of accepting and hosting either of two networked modules to support connection of CobraNet or Dante networked audio transport streams. Audio, control and monitoring signals shall be conducted to and from the power ampliﬁer via Ethernet connections. Attenuation controls for each channel shall be located on the rear panel, along with output impedance and channel bridging selection switches. Control voltage inputs shall be provided for each channel to allow for external gain control. Fault outputs on each channel shall be provided to allow monitoring of the operation of individual channels. Power sequencing connections shall be provided via three-position Euro-style connectors. Instantaneous Gain Modulation shall provide overload protection for each channel. The dimensions (HxWxD) shall not exceed 3.5" x 19" x 18.55" (89 x 483 x 471 mm). The multi-channel power ampliﬁer shall be the Crest Audio Ci 30x4 or approved equivalent.